The Z User Group (ZUG) was established in 1992 to promote use and development of the Z notation, a formal specification language for the description of and reasoning about computer-based systems. It was formally constituted on 14 December 1992 during the ZUM'92 Z User Meeting in London, England.

Meetings and conferences

ZUG has organised a series of Z User Meetings approximately every 18 months initially. From 2000, these became the ZB Conference (jointly with the B-Method, co-organized with APCB), and from 2008 the ABZ Conference (with abstract state machines as well). In 2010, the ABZ Conference also includes Alloy, a Z-like specification language with associated tool support. The Z User Group participated at the FM'99 World Congress on Formal Methods in Toulouse, France, in 1999. The group and the associated Z notation have been studied as a community of practice.

List of proceedings

The following proceedings were produced by the Z User Group: The following ZB conference proceedings were jointly produced with the Association de Pilotage des Conférences B (APCB), covering the Z notation and the related B-Method: From 2008, the ZB conferences were expanded to be the ABZ conference, also including abstract state machines.

Chair and secretary

Successive chairs have been: Successive secretaries have been: